Control-valve for compressors



F. I. HEIDEMANJ CONTROL VALVE FOR COMPRESSORS.

APPLICATION FILED DCT- I3, IJIQ.

7.6 [I i I v MI. 7. 0D I H m a "all 8 M a1 m1 P I HU w Zara main/Am WW UNITED STATES PATENT cries.

FRED J. HEIDEMAN. 015 DETROIT. MICHIGAN. AssIG OR. BY DIRECT AND MESNE ASSIGNMENTS, T0 HOUSEHOLD UTILITIES CORPORATION, or nn'rnorr. MICH- IGAN, A conronarron or DELAWARE.

CONTROL-VALVE EUR CGMPRESSURS.

Application filed October 13, 1919.

To all whom it may concern:

Be it known that l, Fnnod. HnnmMAN, a citizen of the United States. residing at Detroit. in the county of 'Wayne and State of Michigan. have invented a new and useful Control-Valve for Compressors. of which the following is a specification.

This invention relates to gas compressors and more particularly to control valves for the discharge. port of such compressors.

it is the object of the invention to provide a valve. construction for gas compressors adapted for venting a normal charge of compressed gas. and having a supplement ary provision for establishing a larger vent.

when a liquid has accumulated in the cylinder or cylinders of the compressor. due to condensation oi the gas.

in attaining this object the invention contemplates the employment of a discharge valve acted upon by two springs (littering in strength. the weaker spring yielding to permit venting of a gas under normal conditions, and the stronger spring yielding, when said gas has liquefied. to increase the vent opening, as'is required by the relati"el v great inertia ot the liquid.

A preferred embodiment ofthe invention is described in the following specification 0 and illustratedin the accompanying draw- .ing.'wherein,

' Figure 1 is a sectional elevation of a gas compressor improved in accordance with the invention.

Fig. 2 is a. fragmentary duplication of portion of Fig. 1 drawn-to a relatively large scale, said portion disclosing one of the discharge valves.

Fig. 3 is a sectional view of a member 40 forming a mounting for the discharge valve,

taken on line 3-3 of Fig. 2.

Figs. 4 and 5 are views espectively of a discharge valve, and a mem er which forms a stop limiting the normal opening of the valve and an abutment tor opposite ends of the two springs, whereby the valve is held seated.

In these views the reference character 1 designates the cylinders and 2 the pistons of a gas compressor, the cylinders bdingformed an M00 and having the detachable head 3.. held in place. by bolts 4. Between the] cylinders and said head there is clamped a plate 5, which forms a closure for the dis fipeoification 0:! Letters Patent.

Patented Got. 31%, 3920.

Serial no. 330.4113.

clnirge ends of the cylinders. chambers 6 as being formed in the head 3 adjacent said inder) is stationary, and ventingo'l the cylinder is effected by the valve 9. The latter controls a port 11 in the. shank 1H and has an upstanding stem l2 which tele copes within a stem 13 depending from the spring abutment 8. The lower end of the stem 13 7Q acts as a stop to limit the opening movement to which the valve 9 is subjected under normal conditions, and the opening movement which the spring abutment 8 undergoes under abnormal conditions is limited by lugs 14: integral with the head 3. A coiled spring 15 urges the spring abutment 8 to its seat upon the upper portion of the member 7. and a relatively weak coiled spring 16. interposed between the two valves,

urges the valve 9 to its seat. Ports 17 opening laterally in themember T attord an escape from said member into the chamber 6 for such gas as normally vents through the A port ll. When an accunndation of con 5 densed gas in the cylinder m-cessitates an inf creasedvent capacity. the abnormal pressure will effect an unseating of both the member 8 andvalve 9. the latter pushing up the former. and the liquid escaping into the chamber 6 through the. ports .7. The. two side chambers 6 open into the control chamber as indicated at 18. and a discharge. passage 19 leads from said central chamber.

The described construction has an especial application to refrigerating apparatus able abutment for said spring and forming a stop limiting the opening movement of the valve under normal gaseous pressure, a relatively strong spring normally resisting movement of said abutment member, yieldable' under an abnormal pressure upon the valveto increase the opening movement thereof, and means limiting the movement of said abutment member.

2. In a. gas compressor, the combination with a member ported to form an outlet from said compressor, of a valve'seated upon said ported member and controlling said outlet, a spring housed Within said ported member, seating said valve. and designed to yield under a predetermined gase ous pressure, a movable abutment for said spring seated upon said ported member, telescoping stems upon said valve and abutment member limiting the normal opening movement of the valve, and a relatively strong spring resisting movement of said abutment and yieldable under an abnormal pressure on the valve to permit an increased opening thereof.

3. In1a gas compressor, the combination with a cylinder casing and a detachable head therefor, of a plate clamped between said casing and head, the latter being formed with chambers registering with the respective cylinders adjacent said plate,

"members respectively secured to said plate FRED J HEIDEMAN 

